2-Channel USB 2.0 External Digital Sound Adapter - Plug in Headphones & Microphone Through a USB Port! 2-Channel USB 2.0 External Sound Adapter General Features: USB 2.0 interface Integrated 2-channel audio controller Supports 3D positional sound Supports virtual 5.1-channel sound track Built-in Digital Class-B power amplifier Plug and Play Compact and portable design Connectors: USB connector One (1) 3.5 mm microphone in jack One (1) 3.5 mm headphone/speaker out jack